Coil disc assembly and electromagnetic heating device

Abstract

The present application discloses a coil disc assembly and an electromagnetic heating device. The coil disc assembly comprises a support, a plurality of winding units, and a shielding structure; the winding units are annularly arranged, and each has a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; in a pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle portions of the two winding units, thereby forming a closed magnetic field between the two winding units; and in at least one winding unit, a magnetic pole formed in the middle portion thereof is close to one side of the corresponding second winding ring segment, so that the magnetic field can be coupled with the pot wall at the corresponding position starting from the side close to the edge of the support.

Description

Coil disc assembly and electromagnetic heating device

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202422409067.2, filed on September 30, 2024, the entire contents of which are incorporated herein by reference.

[0003] TECHNICAL FIELD

[0004] The present application relates to the technical field of electromagnetic heating, in particular to a coil disc assembly and an electromagnetic heating device. BACKGROUND

[0005] The conventional electromagnetic oven coil disc is a single circular ring spiral winding structure, and its heating effect on the pot is limited by the physical electromagnetic field itself. The heat is concentrated inward. When the pot to be heated is a frying pan, the heat cannot be concentrated on the pot wall due to the too large distance between the side walls, and the heating effect of the pot wall is very poor. Even if the diameter of the coil disc is increased, it is still difficult to increase the heat of the pot wall, and a larger magnetic field is also easily generated around the coil disc, causing misheating and other situations. SUMMARY

[0006] The main purpose of the present application is to provide a coil disc assembly and an electromagnetic heating device, which aims to solve the problem that the existing electromagnetic oven easily generates a larger magnetic field around the coil disc, causing misheating.

[0007] To achieve the above-mentioned purpose, the coil disc assembly provided by the present application comprises:

[0008] The support has two sides in the first direction;

[0009] A plurality of winding units are arranged on at least one side of the support, and the plurality of winding units form at least one pair of winding units. Each pair of winding units comprises two winding units distributed along the circumference of the support. Each winding unit is arranged in a ring shape and has a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; and

[0010] The shielding structure comprises a lateral shielding structure arranged outside the plurality of winding units. The lateral shielding structure is arranged beyond the plurality of winding units or flush with the plurality of winding units on both sides of the support;

[0011] In the pair of winding units, the directions of the currents of the two winding units are set to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one of the winding units, the width of the at least partially segmented first winding ring segment is d1, and the width of the at least partially segmented second winding ring segment is d2, d1>d2.

[0012] The application also provides a coil panel assembly, comprising:

[0013] A support having two sides in a first direction;

[0014] A plurality of winding units arranged on at least one side of the support, the plurality of winding units forming at least one pair of winding units, each pair of winding units comprising two winding units arranged on the support and distributed along the circumferential direction of the support, each winding unit being arranged in a ring shape, having a first winding ring segment close to the center of the support, and a second winding ring segment close to the edge of the support; and

[0015] A shielding structure comprising a lateral shielding structure arranged outside the plurality of winding units, the lateral shielding structure being arranged beyond the plurality of winding units towards both sides of the support, or being arranged flush with the plurality of winding units;

[0016] In the pair of winding units, the directions of the currents of the two winding units are set to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one of the winding units, the winding center of the winding unit is located on the side close to the second winding ring segment at the geometric center of the winding unit.

[0017] In an embodiment, the winding gap of at least part of the first winding ring segment is greater than the winding gap of the second winding ring segment.

[0018] In an embodiment, the support is provided with a winding structure for winding the winding units, the winding structure comprising:

[0019] A first winding part comprising a plurality of first winding grooves formed on one side of the support;

[0020] A second winding part defining a second winding groove with a slot towards the circumferential side of the support between the second winding part and the support; and

[0021] The first winding ring segment corresponds to the plurality of first winding grooves, and the second winding ring segment is limited in the second winding groove.

[0022] In an embodiment, the distance between the lateral shielding structure and the corresponding second winding ring segment is d, 0<d≤50mm.

[0023] In an embodiment, the lateral shielding structure comprises a plurality of shielding sheets arranged correspondingly at the periphery of the plurality of winding units.

[0024] In an embodiment, the shielding sheets correspond to a central angle of θ1 in the circumferential direction of the support, and the winding units correspond to a central angle of θ2, and the ratio of θ1 to θ2 is (1-10):(8-10).

[0025] In an embodiment, 30°≤θ1≤50°, and 85°≤θ2≤90°.

[0026] In an embodiment, the lateral shielding structure comprises a shielding ring arranged at the periphery of the plurality of winding units.

[0027] In an embodiment, the shielding structure further comprises a bottom shielding structure arranged at one side of the plurality of winding units in the first direction.

[0028] In an embodiment, the bottom shielding structure comprises:

[0029] a magnet structure arranged at one side of the plurality of winding units in the first direction; and / or,

[0030] a shielding seat arranged at one side of the plurality of winding units in the first direction, and the shielding seat is provided for mounting of one side of the support.

[0031] In an embodiment, the shielding seat is provided for mounting of one side of the support with the lateral shielding structure.

[0032] In an embodiment, the plurality of winding units are arranged in series or in parallel.

[0033] The application also proposes an electromagnetic heating device, comprising a coil disc assembly, the coil disc assembly comprising:

[0034] a support having two sides in the first direction;

[0035] a plurality of winding units arranged at at least one side of the support, the plurality of winding units forming at least one pair of winding units, each pair of winding units comprising two winding units distributed along the circumferential direction of the support, each winding unit being arranged in a ring shape having a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; and

[0036] a shielding structure comprising a lateral shielding structure arranged at the periphery of the plurality of winding units, the lateral shielding structure being arranged beyond the plurality of winding units or being arranged flush with the plurality of winding units on both sides of the support;

[0037] In the pair of winding units, the directions of the currents of the two winding units are set to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one of the winding units, the width of at least a part of the first winding ring segment is d1, the width of at least a part of the second winding ring segment is d2, and d1 is greater than d2.

[0038] The application also provides an electromagnetic heating device, comprising a coil disc assembly, the coil disc assembly comprising:

[0039] A support having two sides in a first direction;

[0040] A plurality of winding units arranged on at least one side of the support, the plurality of winding units forming at least one pair of winding units, each pair of winding units comprising two winding units distributed along the circumference of the support, each winding unit being arranged in a ring shape and having a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; and

[0041] A shielding structure comprising a lateral shielding structure arranged outside the plurality of winding units, the lateral shielding structure being arranged beyond the plurality of winding units on both sides of the support or being arranged flush with the plurality of winding units;

[0042] In the pair of winding units, the directions of the currents of the two winding units are set to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one of the winding units, the winding center of the winding unit is located on the side close to the second winding ring segment at the geometric center of the winding unit.

[0043] In the technical solution of the present application, the coil disc assembly comprises a support and a plurality of winding units, the plurality of winding units are arranged on the support, the plurality of winding units are distributed along the circumference of the support, each winding unit is arranged in a ring shape, and has a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support. In a pair of winding units, the current directions of the two winding units are arranged to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, thereby forming a closed magnetic field between the two winding units. In at least one winding unit, the magnetic pole formed in the middle part is close to one side of the corresponding second winding ring segment, so that the magnetic field can be coupled with the position of the corresponding pot wall from the side close to the edge of the support, and the heating range of the pot wall is increased, so that the uniformity of the heating of the pot bottom and the pot wall of the pot is improved. By arranging the lateral shielding structure outside the plurality of winding units, and arranging the lateral shielding structure to be higher than the plurality of winding units on both sides of the support or flush with the plurality of winding units, the metal devices outside the coil disc assembly can be well insulated from the magnetic field of the coil, thereby avoiding the problem of false heating of the surrounding metal devices caused by the electromagnetic heating device. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Fig. 1 is a top view structural schematic diagram of an embodiment of a coil disc assembly provided by the present application;

[0046] Fig. 2 is an exploded schematic diagram of the coil disc assembly in Fig. 1;

[0047] Fig. 3 is a structural schematic diagram of the current direction of the plurality of winding units in Fig. 1 after being energized;

[0048] Fig. 4 is a structural schematic diagram of the lateral shielding structure in Fig. 1, which is arranged to be higher than the plurality of winding units on both sides of the support;

[0049] Fig. 5 is a schematic diagram of the winding structure arranged on the support in Fig. 1;

[0050] Fig. 6 is a top view structural schematic diagram of another embodiment of a coil disc assembly provided by the present application;

[0051] Fig. 7 is an exploded schematic diagram of the winding unit in Fig. 1, which is provided with a bottom shielding structure on one side;

[0052] Fig. 8 is a schematic cross-sectional view of the wire winding unit and the bottom shielding structure in Fig. 7;

[0053] Fig. 9 is a schematic view of the coil panel assembly heating the side wall of the pot.

[0054] Brief Description of the Drawings:

[0055] 100, coil panel assembly; 1, support; 11, first side; 12, second side; 13, first winding part; 14, second winding part; 15, positioning hole; 2, wire winding unit; 21, first winding ring segment; 22, second winding ring segment; 3, shielding sheet; 4, magnet structure; 5, shielding ring; 6, shielding seat; 61, mounting hole; 201, pot.

[0056] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings. Embodiments of the present application

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0058] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0059] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solutions are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

[0060] The conventional electromagnetic oven coil disc is single circular ring spiral winding structure, and the heating effect on the pot is limited by the physical electromagnetic field itself. The heat is concentrated inward. When the pot to be heated is a frying pan, the heat cannot be concentrated on the pot wall due to the too large distance between the side walls, and the heating effect of the pot wall is poor. Even if the diameter of the coil disc is increased, it is difficult to increase the heat of the pot wall, and a larger magnetic field is easily generated around the coil disc, causing misheating and the like.

[0061] In view of this, the coil disc assembly is provided to solve the problems of poor heating effect of the existing electromagnetic oven on the pot wall and easy generation of a larger magnetic field around the coil disc.

[0062] Please refer to FIG. 1 and FIG. 2, the coil disc assembly 100 provided by the present application, the coil disc assembly 100 includes a support 1, a plurality of winding units 2, and a shielding structure, the support 1 has two sides in the first direction; the plurality of winding units 2 is arranged on at least one side of the support 1, the plurality of winding units 2 forms at least one pair of winding units 2, each pair of winding units 2 includes two winding units 2 distributed along the circumference of the support 1, each winding unit 2 is arranged in a ring shape, which has a first winding ring segment 21 close to the center of the support 1, and a second winding ring segment 22 close to the edge of the support 1, in the pair of winding units 2, the current direction of the two winding units 2 is set to be opposite, so that the middle part of the two winding units 2 forms opposite magnetic poles, please refer to FIG. 3, and in at least one winding unit 2, the width of the first winding ring segment 21 is d1, and the width of the second winding ring segment 22 is d2, d1 is greater than d2; the shielding structure includes a lateral shielding structure arranged outside the plurality of winding units 2, the lateral shielding structure extends to both sides of the support 1 (i.e. both sides of the support 1 in the thickness direction, if the thickness direction of the support 1 is upward and downward, it means in the upward and downward directions), or is arranged flush with the plurality of winding units 2.

[0063] In the technical scheme provided in the application, the lateral shielding structure is arranged outside the plurality of winding units 2, and the lateral shielding structure is arranged beyond the plurality of winding units 2 or flush with the plurality of winding units 2 on both sides of the support 1, so that the metal device outside the coil disc assembly can better play a role in isolating the magnetic field of the coil, thereby avoiding the problem of scalding caused by heating of the surrounding metal device when the electromagnetic heating device is working. In at least one winding unit 2, the width of the first winding ring segment 21 is d1, and the width of the second winding ring segment 22 is d2, d1 is greater than d2, so that the magnetic poles formed in the middle of the winding unit 2 can be closer to the edge side of the support 1, and can be coupled with the position of the corresponding pot wall. Referring to FIG. 9, the heating range of the pot wall is increased, so that the uniformity of heating of the pot bottom and the pot wall of the pot 201 is improved, so as to solve the problem that the existing electromagnetic heating device has poor heating effect on the pot wall, and even if the diameter of the coil is increased, it is difficult to increase the heat of the pot wall.

[0064] In another coil disc assembly 100 provided in the application, the coil disc assembly 100 comprises a support 1, a plurality of winding units 2, and a shielding structure. The support 1 has two sides in a first direction. The plurality of winding units 2 are arranged on at least one side of the support 1. The plurality of winding units 2 form at least one pair of winding units 2. Each pair of winding units 2 comprises two winding units 2 distributed along the circumference of the support 1. Each winding unit 2 is arranged in a ring shape and has a first winding ring segment 21 close to the center of the support 1 and a second winding ring segment 22 close to the edge of the support 1. In the pair of winding units 2, the current directions of the two winding units 2 are opposite, so that the middle parts of the two winding units 2 form opposite magnetic poles. In at least one winding unit 2, the winding center of the winding unit 2 is located on the side close to the second winding ring segment 22 of the geometric center of the winding unit 2. The shielding structure comprises a lateral shielding structure arranged outside the plurality of winding units 2. The lateral shielding structure is arranged beyond the plurality of winding units 2 or flush with the plurality of winding units 2 on both sides of the support 1.

[0065] The technical scheme provided in the application is characterized in that a lateral shielding structure is arranged outside the plurality of winding units 2, and the lateral shielding structure is arranged to extend beyond the plurality of winding units 2 on both sides of the support 1 or is arranged to be flush with the plurality of winding units 2, so that the metal devices outside the coil disc assembly can be well insulated from the magnetic field of the coil, thereby avoiding the problem of scalding caused by heating of the surrounding metal devices when the electromagnetic heating device is working. In at least one winding unit 2, the winding center of the winding unit 2 is located on the side close to the second winding ring segment 22 at the geometric center, so that the magnetic poles formed in the middle of the winding unit 2 can be closer to the edge side of the support 1, can be coupled with the position of the corresponding pot wall, and the heating range of the pot wall is increased, so that the uniformity of heating of the bottom and the wall of the pot is improved, thereby solving the problem that the existing electromagnetic heating device has poor heating effect on the pot wall, and even if the diameter of the coil is increased, the heat of the pot wall is difficult to increase.

[0066] It should be noted that in the prior art, the conventional coil disc is arranged in a circular ring spiral winding structure, the gaps between the two adjacent winding coils are uniform and the same, and when the conventional coil disc is coupled with the pot, especially the wok type pot, the coupling is limited by the modeling characteristics of the wok, the sidewall of the pot is far away from the bottom, the corresponding magnetic field density of the coil disc is small, the heating efficiency is low, and in the working process of the electromagnetic heating device, if a large current is supplied to the coil disc, a large magnetic field is generated around the coil disc. If there are metal devices, such as knives and spoons, in the range of the magnetic field outside the coil disc, the metal devices are easily heated and scalded.

[0067] It should be noted that the "the support 1 has two sides in the first direction" in the present application refers to the support 1 having a first side 11 and a second side 12 opposite to each other in the first direction, and the first side 11 of the support 1 is used to heat the utensil to be heated. It can be understood that the support 1 has a first side 11 above and a second side 12 below, as shown in FIG. 2, that is, the first side and the second side constitute the two sides of the support 1 in the first direction.

[0068] The shapes of the winding units 2 in the plurality of winding units 2 can be the same or different. Each winding unit 2 is formed by winding a plurality of turns of wire, and each turn of wire in each winding unit 2 can be regarded as a ring structure. Of course, the ring structure is not limited to a circular shape, but can also be a square or an oval shape. Each winding unit 2 can be laid flat along a plane area, which can be a flat surface or a curved surface. Each winding unit 2 can also be arranged in a bent manner, which can be determined according to actual conditions, and the embodiments of the present application do not limit this.

[0069] The multiple winding units 2 can be distributed in a ring shape on the same side of the support 1, or part of the winding units 2 can be arranged on one side of the support 1 and the other part of the winding units 2 can be arranged on the other side of the support 1, as long as they are distributed in a ring shape on the projection plane of the support 1.

[0070] The direction of the current refers to the flow direction of the current of the winding unit 2 along the clockwise or counterclockwise direction, and the directions of the currents of the two winding units 2 are opposite, that is, when the direction of the current of one winding unit 2 is clockwise, the direction of the current of the other winding unit 2 is counterclockwise.

[0071] It should be noted that according to Ampere's rule: hold the energized solenoid with the right hand, let the four fingers point to the direction of the current, then the thumb points to the N pole of the energized solenoid, so when the directions of the currents of the two winding units 2 are opposite, a closed magnetic field is formed between the two winding units 2, for example, one of the two winding units 2 is arranged as a first winding unit and the other is arranged as a second winding unit, when the first winding unit and the second winding unit are arranged horizontally, that is, the upper side of the first winding unit forms a magnetic pole N, the lower side forms a magnetic pole S, at the same time, the upper side of the second winding unit forms a magnetic pole S, and the lower side forms a magnetic pole N; in this way, the magnetic field lines go from the N pole of the first winding unit to the S pole of the second winding unit, then from the S pole of the second winding unit to the N pole, and then from the N pole of the second winding unit to the S pole of the first winding unit, and finally from the S pole of the first winding unit back to the N pole of the first winding unit, thereby forming a closed magnetic field.

[0072] Then, when a pair of winding units 2 are energized, the closed magnetic field formed between the two special-shaped magnetic poles formed by the two winding units 2 can interact with the pot wall far away from the winding units 2 to heat the pot wall.

[0073] The "width" in "the width of the first winding ring section 21 is d1, and the width of the second winding ring section 22 is d2, and d1 is greater than d2" refers to the distance between a turn of coil located in the innermost annular ring and a turn of coil located in the outermost annular ring in the multi-turn coil of the winding unit 2 in the outward direction from the geometric center of the winding unit 2. For details, refer to FIGS. 3 and 4. The winding length of the corresponding area of the second winding ring section 22 can be reduced. The winding gap of the first winding ring section 21 can be set to be greater than the winding gap of the second winding ring section 22 when the winding segments of each winding ring section are arranged in parallel. Of course, when the winding segments of each winding ring section are not arranged in parallel, the winding gap will be uneven. However, the other winding segments can be adjusted adaptively, and finally d1 is greater than d2.

[0074] The "winding center of the winding unit 2 is located on the side close to the second winding ring section 22 of the geometric center thereof" can be that the winding unit 2 is arranged in a shape similar to a fan or a triangle, and the geometric center is adjusted by adjusting the shape of the winding unit 2.

[0075] It can be understood that according to Ampere's rule, the magnetic poles formed by the winding unit 2 correspond to the inner ring area of the annular ring. When "d1 is greater than d2" or "the winding center is located on the side close to the second winding ring section 22 of the geometric center thereof", the magnetic poles of the corresponding winding unit 2 are formed in the area close to the outer periphery of the support 1, thereby realizing the largest possible heating range of the pot wall.

[0076] Of course, the specific ways to realize that the width of the first winding ring section 21 is greater than the width of the second winding ring section 22, and the winding center of the winding unit 2 is located on the side close to the second winding ring section 22 of the geometric center thereof are not limited to the above examples. Other changes can be made by those skilled in the art under the inspiration of the technical essence of the embodiments of the present application. As long as the functions and effects realized are the same or similar to those of the embodiments of the present application, they should be covered within the protection scope of the embodiments of the present application.

[0077] The "two sides of the support 1" refers to the two sides of the support 1 in the first direction, i.e., the first side above and the second side below. The "the lateral shielding structure is arranged beyond the plurality of winding units 2 or flush with the plurality of winding units 2 on the two sides of the support 1" means that in the direction of the first side of the support 1, the height of the lateral shielding structure is not less than that of the plurality of winding units 2, and in the direction of the second side of the support 1, the height of the lateral shielding structure is also not less than that of the plurality of winding units 2, so that the metal devices on the periphery of the coil assembly can better isolate the magnetic field of the coil.

[0078] Specifically, the material of the lateral shielding structure can be a soft magnetic material, such as ferrite or nanocrystalline, or a high-conductivity metal, such as aluminum or copper. The material of the lateral shielding structure can also be other materials, which can be determined according to actual conditions, and the embodiments of the present application do not limit this.

[0079] Further, in order to make the magnetic fields generated by the first winding ring segment 21 and the second winding ring segment 22 uniform, so that the pot is uniformly heated, in the present embodiment, the winding gap of at least part of the first winding ring segment 21 is greater than the winding gap of the second winding ring segment 22. By setting the winding gap of the second winding ring segment 22 to be more dense, the magnetic field generated by the second winding ring segment 22 is greater than the magnetic field generated by the first winding ring segment 21, but the magnetic field generated by the second winding ring segment 22 can be distributed more uniformly, so that the area acting on the pot wall is uniformly heated.

[0080] Specifically, referring to FIG. 5, the support 1 is provided with a winding structure for winding the winding unit 2, which includes a first winding part 13 and a second winding part 14. The first winding part 13 includes a plurality of first winding grooves formed on one side of the support 1. The second winding part 14 and the support 1 define a second winding groove with a slot opening toward the circumferential side of the support 1. The first winding ring segment 21 is arranged in the plurality of first winding grooves, and the second winding ring segment 22 is limited in the second winding groove.

[0081] In this way, on the support 1, the first winding ring segment 21 can be wound in the first winding groove in a sparse manner, and the second winding ring segment 22 can be limited in the second winding groove in a side winding manner.

[0082] Further, in order to make the lateral shielding structure better play the role of isolating the magnetic field of the coil, the distance between the lateral shielding structure and the corresponding second winding ring segment 22 is d, 0 < d ≤ 50 mm.

[0083] In this way, the lateral shielding structure and the corresponding second winding ring segment 22 have a gap, so that the lateral shielding structure better plays the role of isolating the magnetic field of the coil, and the gap is not too large. If the gap is too large, magnetic leakage phenomenon is easy to occur, and the role of isolating the magnetic field of the coil cannot be better played.

[0084] Further, the lateral shielding structure includes a plurality of shielding pieces 3 which are correspondingly arranged at the periphery of the plurality of winding units 2 and are arranged in a spaced manner.

[0085] In the technical solution of the present application, a plurality of shielding pieces 3 are arranged at the periphery of the plurality of winding units 2 in a spaced manner, and the plurality of shielding pieces 3 are correspondingly arranged with the plurality of winding units 2 to better isolate the magnetic field at the periphery of the coil disc assembly. It can be understood that, referring to FIG. 1, the distance between the shielding piece 3 and the corresponding second winding ring segment 22 is d; referring to FIG. 4, the shielding piece 3 is arranged beyond the plurality of winding units 2 or is arranged flush with the plurality of winding units 2 on both sides of the support 1.

[0086] Specifically, in the circumferential direction of the support 1, the central angle corresponding to the shielding piece 3 is θ1, the central angle corresponding to the winding unit 2 is θ2, and the ratio of θ1 to θ2 is (1~10):(8~10).

[0087] It should be noted that "the central angle corresponding to the shielding piece 3 is θ1" refers to the included angle formed by the two ends of the shielding piece 3 and the center of the support 1, and "the winding unit 2 corresponding to the shielding piece 3" in "the central angle corresponding to the winding unit 2 is θ2" refers to the winding unit 2 corresponding to the shielding piece 3. Then, "the central angle corresponding to the winding unit 2 is θ2" refers to the included angle formed by the two sides of the outermost circle of the winding unit 2 corresponding to the shielding piece 3 and the center of the support 1. By reasonably controlling the ratio of θ1 to θ2, the magnetic field at the periphery of the coil disc assembly can be better isolated.

[0088] Further, 30° ≤ θ1 ≤ 50°, 85° ≤ θ2 ≤ 90°. In this way, by further optimizing the value range of the central angle θ1 corresponding to the shielding piece 3 and the value range of the central angle θ2 corresponding to the corresponding winding unit 2, the shielding effect of the magnetic field at the periphery of the coil disc assembly can be further improved.

[0089] In another embodiment, referring to FIG. 6, the lateral shielding structure includes a shielding ring 5 arranged at the periphery of the plurality of winding units 2. The shielding ring 5, i.e., a ring-shaped shielding structure, is sleeved at the periphery of the plurality of winding units 2, and can better shield the magnetic field at the periphery of the coil assembly to achieve a better shielding effect.

[0090] Further, the shielding structure further includes a bottom shielding structure arranged at one side of the plurality of winding units 2 in the first direction.

[0091] It should be noted that if the workbench on which the electromagnetic heating device is arranged is a metal workbench such as a stainless steel workbench, the workbench is easily heated by the electromagnetic heating device to cause the base of the electromagnetic heating device to melt. In addition, if the magnetic field leaked from the bottom is too strong, some electronic components below the coil assembly can be damaged. In the present embodiment, the bottom shielding structure can be arranged below the plurality of winding units 2. By arranging the bottom shielding structure below the plurality of winding units 2, the magnetic field shielding effect at the bottom of the coil assembly can be enhanced, and the problems of the base of the electromagnetic heating device melting due to the workbench being heated by the electromagnetic heating device and some electronic components below the coil assembly being damaged can be improved.

[0092] Specifically, in an embodiment, the bottom shielding structure includes a magnet structure 4 arranged at one side of the plurality of winding units 2 in the first direction.

[0093] It should be noted that the material of the magnet structure 4 can be ferrite or nanocrystalline, or other materials, which can be determined according to actual conditions, and the present embodiment does not limit this. The magnet structure 4 with good magnetic conductivity is conducive to gathering magnetic lines of force, improving the heating power and heating efficiency of the coil assembly. At the same time, the problem of the base of the electromagnetic heating device melting due to the workbench being heated by the electromagnetic heating device can be avoided, and the electronic components arranged below the coil assembly can be shielded from the coil magnetic field to ensure the reliability of the electronic components. Specifically, the magnet structure 4 is adhesively bonded to the support 1, and the magnet structure 4 is located below the plurality of winding units 2.

[0094] Further, referring to FIG. 7, the bottom shielding structure further includes a shielding seat 6 arranged at one side of the plurality of winding units 2 in the first direction, and one side of the support 1 is mounted to the shielding seat 6.

[0095] In the technical solution of the present application, the shielding seat 6 is arranged below the magnet structure 4 to further improve the magnetic shielding effect below the coil disc assembly, and a plurality of mounting holes 61 are arranged on the shielding seat 6. The support 1 is provided with a plurality of positioning holes 15 corresponding to the plurality of mounting holes 61 on the side facing the shielding seat 6. During installation, the positioning holes 15 are aligned with the corresponding mounting holes 61, and screws are screwed into the positioning holes 15 and the mounting holes 61 to fix the support 1 on the shielding seat 6.

[0096] Specifically, the material of the shielding seat 6 can be a soft magnetic material such as ferrite or nanocrystalline, or a high-conductivity metal such as aluminum or copper. The material of the shielding seat 6 can also be other materials, which can be determined according to actual conditions, and the present application does not limit this.

[0097] Specifically, the shielding seat 6 is arranged on the side facing the support 1. On the side facing the support 1, the shielding seat 6 is provided with mounting areas at the edges, and the lateral shielding structure is adhered to the corresponding mounting areas to realize the installation of the lateral shielding structure. In this embodiment, the lateral shielding structure includes the shielding sheet 3, as shown in FIG. 8.

[0098] Further, the plurality of winding units 2 are arranged in series or in parallel.

[0099] When the plurality of winding units 2 are arranged in series, the current direction of the adjacent winding units 2 can be reversely arranged by adjusting the winding direction, which is simple and convenient for production and processing.

[0100] When the plurality of winding units 2 are arranged in parallel, each winding unit 2 can be controlled to be powered on, which not only realizes the reverse arrangement of the current direction of the adjacent winding units 2, but also flexibly controls the current direction of each winding unit 2 in special scenarios, which is more flexible and convenient in electrical control. Moreover, when some of the winding units 2 fail, the other winding units 2 are not affected and can still work normally.

[0101] Specifically, in this embodiment, the two adjacent winding units 2 are riveted, welded or screwed to stably connect and conduct the plurality of winding units 2. Of course, other possible connection forms can also be used, which can be determined according to actual conditions, and the present application does not limit this.

[0102] The application further provides an electromagnetic heating device, which comprises the coil disc assembly and the electric control device of the above-mentioned embodiments. The specific structure of the coil disc assembly is referred to the above-mentioned embodiments. Since the electromagnetic heating device adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0103] The electromagnetic heating device can be an electromagnetic oven, an electromagnetic heating stove and the like. Only the electromagnetic heating device with the coil disc assembly belongs to the electromagnetic heating device of the application.

[0104] The above-mentioned is only an exemplary embodiment of the application, which does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the application and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A coil disk assembly, wherein, The coil disc assembly comprises: a support having two sides in a first direction; a plurality of winding units arranged on at least one side of the support, the plurality of winding units forming at least one pair of winding units, each pair of winding units comprising two winding units distributed along the circumference of the support, each winding unit being arranged in a ring shape and having a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; and a shielding structure comprising a lateral shielding structure arranged on the periphery of the plurality of winding units, the lateral shielding structure being arranged beyond the plurality of winding units or flush with the plurality of winding units on both sides of the support. In the pair of winding units, the directions of current flow of the two winding units are arranged to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one winding unit, the width of at least a part of the first winding ring segment is d1, and the width of at least a part of the second winding ring segment is d2, d1>d2.

2. A coil former assembly, wherein, The coil disc assembly comprises: a support having two sides in a first direction; a plurality of winding units arranged on at least one side of the support, the plurality of winding units forming at least one pair of winding units, each pair of winding units comprising two winding units arranged on the support and distributed along the circumference of the support, each winding unit being arranged in a ring shape and having a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support; and a shielding structure comprising a lateral shielding structure arranged on the periphery of the plurality of winding units, the lateral shielding structure being arranged beyond the plurality of winding units or flush with the plurality of winding units on both sides of the support. In the pair of winding units, the directions of current flow of the two winding units are arranged to be opposite, so that the middle parts of the two winding units form opposite magnetic poles, and in at least one winding unit, the winding center of the winding unit is located on the side close to the second winding ring segment.

3. The coil former assembly of claim 1 or 2, wherein, The winding gap of at least a part of the first winding ring segment is greater than the winding gap of the second winding ring segment.

4. The coil former assembly of claim 3, wherein, The support is provided with a winding structure for winding the winding units, and the winding structure comprises: a first winding part comprising a plurality of first winding grooves formed on one side of the support; a second winding part defining a second winding groove with a slot towards the circumferential side of the support between the support; and wherein the first winding ring segment corresponds to the plurality of first winding grooves, and the second winding ring segment is limited in the second winding groove.

5. The coil former assembly of claim 1 or 2, wherein, The distance between the lateral shielding structure and the corresponding second winding ring segment is d, 0<d≤50mm.

6. The coil former assembly of claim 1 or 2, wherein, The lateral shielding structure comprises a plurality of shielding pieces arranged correspondingly on the periphery of the plurality of winding units and spaced apart.

7. The coil former assembly of claim 6, wherein, In the circumferential direction of the support, the central angle of the shielding piece corresponding to the winding unit is θ1, and the central angle of the corresponding winding unit is θ2, and the ratio of θ1 to θ2 is (1~10):(8~10).

8. The coil former assembly of claim 7, wherein, 30°≤θ1≤50°, 85°≤θ2≤90°.

9. The coil former assembly of claim 1 or 2, wherein, The lateral shielding structure includes a shielding ring disposed at the periphery of the plurality of winding units.

10. The coil former assembly of claim 1 or 2, wherein, The shielding structure further includes a bottom shielding structure disposed at one side of the plurality of winding units in the first direction.

11. The coil former assembly of claim 10, wherein, The bottom shielding structure includes: a magnet structure disposed at one side of the plurality of winding units in the first direction; and / or, a shielding seat disposed at one side of the plurality of winding units in the first direction, and the shielding seat is provided for mounting of one side of the support.

12. The coil former assembly of claim 11, wherein, The shielding seat is provided for mounting of one side of the support.

13. The coil former assembly of claim 1 or 2, wherein, The plurality of winding units are arranged in series or in parallel.

14. An electromagnetic heating device, wherein, The electromagnetic heating device includes the coil disc assembly according to any one of claims 1 to 13.

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